Waste stripping mechanism for carton blank forming apparatus



- e. KANE 9 79 WASTE STRIPPING MECHANISM FOR CARTON BLANK FORMINGAPPARATUS 2 Sheets-Sheet l Filed Feb. 28, 1951 mmw mm NQ \n INVENTOR.

M aT ca ATTORNEY Aug. '4, G. KANE WASTE STRIPPING MECHANISM FOR CARTONBLANK FORMING APPARATUS 2 Sheets-Sheet 2 Filed Feb. 28, 1951 IN VEN TOR.14M (44;

ATTORNEY Patented Aug. 4, 1953 WASTE STRIPPING MECHANISM FOR CARA,- TONBLANK FORMING APPARATUS Gideon Kane, Green Bay, Wis.

Application February 28, 1951, Serial No. 213,097

The invention relates to carton blank forming apparatus and moreparticularly to a method and apparatus for automatically removing thewaste from the cut carton blank.

In carton making, the general practice has been to remove the waste fromthe cut blank manually. The object of this invention is to provide amethod and apparatus by which the stripping of the waste from the blankis accomplished mechanically. More particularly, with the presentapparatus, after the blank is cut by the blanking press, it is fed pasta stripping mechanism which operates in synchronism with the feed of theweb to the blanking press, and the waste from the blank is positivelyremoved as the blank is carried to a mechanism fore delivering thefinished cut blank from the machine. The stripping mechanism includes apair of rolls between which the cut blank is fed, one of these rollsprovided with pin disposed to engage the waste portions of the blank andupon which said waste portions are impaled as the blank passes to thedelivery mechanism, the impaled waste portions being subsequentlyremoved from the pins on the above mentioned roll.

A further object of the invention is to provide a stripping apparatusincluding a wooden or wooden faced roll of the same diameter as that ofthe printing cylinder, used to repeat print on the web which is fedthrough the blanking press, which roll is driven at the same speed asthe feed mechanism for the blanking press, so that substantiallyabsolute registry is obtained to bring the waste portions of the cutblanks into contact with the same areas of said wooden faced roll, saidwooden roll having pin projections disposed-in said waste portion areasupon which these waste portions are impaled as the blank is carriedoutof the press. In connection with this mechanism a simple method oflocating the waste removing pins has been developed comprisingsuccessively nailing down the waste portions of a cut blank onto thewooden roll as the blank is carried out of the press and successivelycutting off those portions of the nailsthat project above the naileddown waste portions to form a stripping roll for removing the waste fromthe particular form of carton blank then being cut by the blankingpress. While a different wooden roll is used for each different form ofcarton blank, these rolls are relatively inexpensive, and the methodabove described insure positive removal of .the waste portions of theblank in an expeditious manner.

The invention further consists in the several 2 Claims. (01. 93-36)features hereinafter described and more particularly defined by claimsat the conclusion hereof.

In the drawings:

Fig. 1 is a side elevation view of blank forming apparatus including thestripping mechanism embodying the invention;

Fig. 2 is a plan view of the apparatus, parts being broken away;

Fig. 3 is a detailed vertical sectional view taken on the line 3-3 ofFig. 1;

Fig. 4 is a detailed vertical sectional view taken on the line 4-4 ofFig. 3;

Fig. 5 is an end elevation view of the delivery conveyor and itssupporting frame;

Fig. 6 is a detailed elevation view of a portion of the strippingmechanism and a carton blank;

Fig. 7 is a detailed vertical sectional view taken on the-line 1-! ofFig. 6.

Referring to Figs, 1 and 2, I have shown a blank forming apparatuscorresponding to that of my copending application Serial No. 165,015,filed May 29, 1950, for Method and Apparatus for Making Box Blanks, towhich reference may be had for details not specifically shown anddescribed herein, such parts of this apparatus being shown herein as aredirectly associated with the stripper mechanism embodying thisinvention. The apparatus includes a frame I [I having a blanking press Pmounted thereon including a reciprocatory platen II on which the cuttingdies D are mounted, which dies cooperate with a stationary platen (notshown) on said frame to cut the carton blank from the web W as it isintermittently advanced through the apparatus. For advancing the web Wto the press a set of feed rolls I3, I4, and I5 draw the web from asupply roll or from a printing press and advance it to form a loop I6which passes upwardly over a curved apron II forming part of a flat bedI8 over which the web passes and along which it is drawn by sets of drawrolls I9 and Zll cooperating with a pin belt 2|, to advance the web tothe blanking press P.

As in the aforementioned application, a geared head electric motor M isoperatively connected by a belt and pulley drive 22, to a shaft 23connected by gears 24 and 25 with a lay shaft 26, which shaft isconnected by a chain and sprocket drive 27 to the platen operating crankshaft 28 and by a belt and pulley drive 29 to a shaft 30. The crankshaft 28 is operatively connected to the reciprocatory platen I I byconnectin rods 3|. The shaft 30 carries variable length crank mechanism32 whose adjustable crank pin 33 is pivotally connected to a rack bar 34which. meshes with a pinion 34a, loose on a shaft 35 and connected withan oscillatory feed pawl 36 engageable with a ratchet wheel 36a fixed tothe shaft 35, which shaft carries the draw rolls. The pawl and ratchetdrive mechanism above described functions to intermittently advance theweb W into the blanking press in amounts equal to the carton blanklengths with the printed matter in proper registry with the finishedblank. The shaft 35 is also operatively connected to the feed rolls l3,Hi, and 55 through a belt and pulley,

drive 31 to a shaft 38 connected by a chain and "59 bearing upon theroll 44 and straddling the sprocket drive 33 to a shaft. do connectedby, a

belt and pulley drive M to a shaft-d2 whiomas shown in said application,has a gear connection indicated here by Mic with gears on the shafts forthe rolls 13, M, and I", soirthat the feed of,

the web to the loop is the same as the feed of said web through the drawrolls l9 and 20.

Ihe stripper mechanism embodying the invention includesa pair of feedrolls A3 and M,

driven from the shaftffio l to advance the :blanked.

web from the blanking press the same amount it is fed into said press,that the length of a carton blank andatthe same rate.

pins 56 pry the impaled waste from the roll 44. As previously noted, thediameter of each roll :46! is the same-as that of the plate cylinderused .in printing the carton blank and the sprocket 4!) used to drivethis roll has the same pitch .cliameter .as the diameter of said platecylinder.

The feed roll #3 is a soft faced =rubberirol1 whose. shaftntta isujournalled :in .an auxiliary frame F and is positively driven by iaisprocketi d5 meshing withIone of the runs-of a double chain ii: runningover a double width sprocketdl so that this roll is positively driven.The :outer diameter of the roll 'l l is such that its circumference isequal to the length of the cut blank.

and is of the same diameter as that of the plate cylinder used in"printing the web inthe spaces thereof forming portions of the finishedcut blanks and the pitch diameter of "the sprocket a 49 is the'sam'e asthe diameter of the roll ll and i the pitch diameterof the sprocketd'iis'the same as that of rolls i so that the of web fed int out of thepress same length o the blanking press will 'be fed by the'rollsdfi-andM and the same portions of the cut blanks and waste carried out of the:press will always contact the i same spots on the -ro'll i t.- Thustheroll M- is a repeat roll foreach particular design-of blank blanked outby the :cutting and creasing prcss,

and since these designs mayhvary sothat-the diameters of the rollsdliimay vary, the shaft 48 for the roll .lhl :isjournalled in.verticailyadjust-able bearing boxesfifi carried by jfeed screw shafts51 mounted in the frameigFtowaccoma modate the different sizes ofv rolls"A l that maybe used.

For tensioning the double chain M5,v avdouble tooth sprocketfiil isrotatably mounted ona stud shaft '53 -.carried.by a verticallyadjustable block 54 carried by a feed screw shaft. 55 meuntedin theframe For strippinggthe'waste from the cut blank the roller hl isprovided-with waste impaling pins .56, v

one .or more of whichzareilocated in the-peripheral surfaceof. said roll:at .those points .where the waste passing :hetween the rolls #3 .and 44occurs.

Referring to Figs. Sand 7., .as asimple method of locating rthe pins 5601113118 repeat roll :44, the

first cut blank 53 with its waste 'Wa on being :led.

out of itherpresslhas itsswasteportions'Wa tacked,

or :nailed'ontolithe roll :54- by .small wire nails or abrads 25.11.whose ihea'ds or ;those portions :58

Each finger 59 is connected to or united with a metal collar 69slidably, mounted on a supporting shaft iii and securable in adjustedposition thereon-by a set screw '62, said shaft extending parallel toand below the axis of the shaft 48 and connected at its ends to slottedsupporting arms 83 which in turn are vertically adjustably secured tothe frame F by clamping bolts td threaded into said frame and carryingspacing collars 65.

After the waste is removed from the cut'blank, it is fed by the rolls'43 and 44 into the bight of a pair of delivery aprons formed by sets ofspaced endless belts it running over spaced rollers B1.

The journals for the outer rollers -61 of each set are adjustablymounted on the f-rame F through jack screws 68 to vary the tensions ofthe belts 6E. The shaft for the lower inner roller 6'! carries asprocket 9 connected by a chain 1|),tensioning sprocket ll, and sprocket"1 2 to the drive shaft l3 of an electric drive motor 'l l. The shaftfor the upper inner roll 61 is-eccentrically mounted in its adjustablebearings ill in the frame Panel at one end carries a gear '16 meshingwith a gear (not shown) on the shaft for the lower roll.

To provide ready access to the dies of the blanking press, the frame Fis mounted to swing out to one side of the press and 'i-s provided witha castor wheel leg -l l, said frame being mounted to swing about a hingepin 18 mounted at one corner of the press P. For holding the frame F inproper alined position when the press is operating, guide rods "l9 'andslidably mounted in brackets 8 l and 82 on the frame Fare slidable intoslotted bracketslllc and Moon the frame of g the press P, and the guiderod Bil-also slides through-a slot 83 in the hinge pin 18 to lock theframe Fagainst swinging movement. "The -ciroumference of the roll fil-is the same as the length -of the web from which anyone of the carton-blanks are out and the term length of the carton blank refers tothis'lengthwhich, of course, may be slightly longer than the actual=length of the carton blank itself.

I desire'it to be understood that this invention is not to '-be limitedto any particular form or arrangement of parts except -in so *far assuch limitations are included in theclaims.

What I claim as =my invention is 1. In the carton blank art, the methodof 10- eating waste inipaling pins in a'stripper roll which comprisestakinga roll having a facing capable jectingends of said .nails to form:the :impaling pins for the removal of Waste from other lblanks:carried-oversaid roll.

cut blank which comprises making a roll having a facing capable ofanchoring nails and having a circumference equal to the length of theblank tobe stripped, moving a cut web in contact with said roll as theroll is rotated through one revolution, and driving nails into saidfacing and through waste portions of the web as it is carried over saidroll, and then cutting oil the projecting ends of said nails to form theimpaling pins for the removal of waste from other blanks carried oversaid roll.

GIDEON KANE.

References Cited in the file of this patent Number UNITED STATES PATENTSName Date Todd Mar. 18, 1890 Coari Oct. 20, 1931 Ungar Oct. 11, 1932Greenwood Oct. 23, 1934 Ruble Dec. 11, 1934 Bell et al Aug. 25, 1942Merritt May 2, 1950 Willbrandt July 18, 1950

